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Ah, good to know. I'll talk to some of the geeks I know to see if they can offer some explanation for why this happens. The good thing is because my employer uses Dell exclusively, I can take one home and try it before I get one. Mark On Saturday, September 27, 2003, at 10:54 AM, Doug Cox wrote: > As I said, I'm an electro-peasant, so I can't answer on the reasons > why. > But I can confirm, with my Latitude at least, that it occurs even with > an > independent power supply for the USB device. > > Doug > ----- Original Message ----- > From: "Mark Sottilaro" <sine@zerocrossing.net> > To: <Loopers-Delight@loopers-delight.com> > Sent: Saturday, September 27, 2003 12:45 PM > Subject: Re: Looping with a PC laptop... which one? > > >> Wouldn't get a Latitude. Don't care if it's that small. >> >> However, what doesn't make any sense to me is this: If I'm using USB >> that doesn't get power from the source of data, there should not be >> any >> ground issues... no? The M-Audio Audiophile has it's own powersupply. >> The only link would be the USB data stream, no? If there was noise on >> that, it would corrupt the signal and be useless. I could see the >> issue if you were using a USB/Audio device that took power from the >> laptop. >> >> Or, I could be totally wrong. >> >> Mark >> >> On Saturday, September 27, 2003, at 07:25 AM, Doug Cox wrote: >> >>> Mark, >>> >>> *SOME* Dell's have a known issue with the grounding of the power >>> supply >>> jack, which causes hummmm in the USB audio output. I know for a fact >>> that >>> Latitudes have this problem, but I can't speak for other models. >>> Dell >>> is >>> very tight lipped about the issue, but when pressed, a good tech >>> support >>> person will tell you that it's a documented problem. The fix? >>> Either >>> use >>> the battery, or put a 3-prong -> 2-prong adapter on the power supply >>> cord. >>> Someone can probably explain how that might be dangerous... I'm an >>> electro-peasant, so I don't know. >>> >>> Personally, if I was starting from scratch, I wouldn't buy a Dell for >>> audio. >>> >>> Doug >>> ----- Original Message ----- >>> From: "Mark Sottilaro" <sine@zerocrossing.net> >>> To: <Loopers-Delight@loopers-delight.com> >>> Sent: Saturday, September 27, 2003 3:08 AM >>> Subject: Looping with a PC laptop... which one? >>> >>> >>>> Hey, >>>> >>>> Well, I knew as soon as I got comfy with a laptop I was using, the >>>> owner would want it back (long story, don't ask) so now I'm looking >>>> for >>>> the replacement. I like Macs, but let's face it, they're pricey. I >>>> have a nice desktop Mac, and I'm not married to Apple's product line >>>> especially when they're twice as expensive for the base machine. >>>> >>>> SO, I've heard that Jon El-Bizri had issues with a Dell and noise >>>> via >>>> USB. I'm using a USB interface that has it's own power supply, so I >>>> honestly don't know how noise could transfer unless the D/A was >>>> screwed >>>> up in some way. The USB (M-audio Audiofile) on the TiBook was fine. >>>> Quiet. My only complaint was it didn't have gain controls. I say >>>> Dell >>>> because our IT dept swears by them and our people are on the road >>>> using >>>> them for shows all the time so they get banged up. I guess they >>>> have >>>> great service. >>>> >>>> any advise would be appreciated. >>>> >>>> Mark Sottilaro >>>> >>> >> >